A secondary grouting device for prestressed ducts of T-beams

Abstract

The utility model provides a kind of secondary grouting device for T beam prestress duct, including the grouting pipe for inputting grouting layer to carry out grouting, the one end of grouting pipe is threadedly connected between connecting pipe, connecting pipe is fixed in the side wall of anchoring backing plate;The one end of anchoring backing plate is fixedly connected between prestressed pipe, and the prestressed pipe and the anchoring backing plate are fixed in the inside of prefabricated T beam;The top end of the grouting pipe of side wall being "L" shape is fixedly connected feed hopper, the side wall of grouting pipe installs tee, and the side wall of tee is vertically installed communicating pipe.The secondary grouting device for T beam prestress duct provided by the utility model has the advantages of facilitating grouting inside duct and discharging air inside duct.

Description

Technical Field

[0001] This utility model relates to the field of T-beam prestressed construction, and in particular to a secondary grouting device for T-beam prestressed ducts. Background Technology

[0002] Prestressed duct grouting is a key process in the construction of prestressed concrete structures, in which special grouting material is injected into the ducts after the prestressed steel tendons have passed through them and prestressed. This process enhances adhesion and durability. Its core purpose is to ensure a tight bond between the prestressed tendons and the concrete, while protecting the steel bars from corrosion, thereby improving the safety and service life of the structure.

[0003] After the grouting construction of the prestressed ducts of beams and slabs is completed, the initial setting time of the grouting material is generally more than 5 hours. However, the grouting pipe is usually removed 1 to 2 hours after the grouting is completed. This often results in the loss of grouting material in the front part of the prestressed pipe, causing the grouting material to be incomplete. In this case, it is necessary to replenish the grouting in the duct. However, due to the presence of the anchor, it is difficult to directly replenish the grouting into the prestressed pipe, which is inconvenient. Moreover, during the replenishment process, it is impossible to completely remove the air inside the prestressed pipe, which affects the density of the grouting material.

[0004] Therefore, it is necessary to provide a new secondary grouting device for prestressed ducts of T-beams to solve the above problems. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a secondary grouting device for T-beam prestressed ducts that facilitates grouting inside the duct and venting air from inside the duct.

[0006] To solve the above-mentioned technical problems, the present invention provides a secondary grouting device for prestressed ducts of T-beams, comprising: a grouting pipe for inputting a grouting layer for grouting; one end of the grouting pipe being threadedly connected to a connecting pipe, the connecting pipe being fixed to the side wall of an anchor plate; one end of the anchor plate being fixedly connected to a prestressed pipe, and the prestressed pipe and the anchor plate being fixed inside the precast T-beam; a feed funnel being fixedly connected to the top of the grouting pipe, which has an "L"-shaped side wall; a tee being installed on the side wall of the grouting pipe, and a connecting pipe being vertically installed on the side wall of the tee.

[0007] Preferably, multiple prestressed steel bars are installed inside the prestressed tube, and one end of each prestressed steel bar is fixed inside the anchor plate by an anchor.

[0008] Preferably, the prestressed pipe is filled with a filling layer, the sidewall of the prestressed pipe is connected to the connecting pipe, and a cavity is formed between the filling layer and the prestressed pipe.

[0009] Preferably, the bottom end of the connecting pipe is fixedly connected to a baffle with an arc-shaped side wall, and the baffle is located inside the tee.

[0010] Preferably, the top end of the connecting pipe is threaded to the connector, the inside of the connector is slidably connected to the slide rod, and the bottom end of the slide rod is fixedly connected to the piston.

[0011] Preferably, the piston is threadedly connected to the interior of the connecting pipe, the bottom end of the piston abuts against the baffle, and the diameter of the piston is equal to the minimum inner diameter of the connecting pipe.

[0012] Compared with related technologies, the secondary grouting device for T-beam prestressed ducts provided by this utility model has the following beneficial effects: This utility model provides a secondary grouting device for prestressed ducts of T-beams. When grouting the inside of the prestressed pipe, the grouting pipe and the connecting pipe are threaded together. After installation, the inlet of the connecting pipe is vertically upward. Grout is fed into the grouting pipe through the feed funnel. The grout flows inside the grouting pipe to form a grout layer. The grout layer flows through the grouting pipe, the tee, and the connecting pipe, finally entering the cavity, facilitating quick filling of the cavity by workers. The thickness of the grout layer inside the tee can be observed through the connecting pipe. The thickness of the grout layer is half the inner diameter of the tee. The tee, the grouting pipe, and the connecting pipe are not completely filled with grout. During the grouting process inside the cavity, the air inside the cavity is discharged through the connecting pipe, the grouting pipe, and the connecting pipe, ensuring that the cavity is completely filled with grout, avoiding residual air inside the prestressed pipe, and increasing the density of the filling layer. Attached Figure Description

[0013] Figure 1 A schematic diagram of a preferred embodiment of the secondary grouting device for T-beam prestressed ducts provided by this utility model; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A. Figure 3 for Figure 2 The diagram shows the internal structure of the tee.

[0014] The following are the labels in the diagram: 1. Precast T-beam, 2. Prestressed pipe, 21. Filling layer, 22. Cavity, 23. Prestressed steel bar, 3. Anchor plate, 31. Connecting pipe, 4. Anchor, 5. Grouting pipe, 6. Feed funnel, 7. T-junction, 71. Connecting pipe, 72. Baffle, 8. Grouting layer, 9. Joint, 10. Sliding rod, 11. Piston. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Please see Figures 1 to 3 , Figure 1 A schematic diagram of a preferred embodiment of the secondary grouting device for T-beam prestressed ducts provided by this utility model; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A. Figure 3 for Figure 2 The diagram shows the internal structure of a tee. A secondary grouting device for prestressed ducts in T-beams includes a grouting pipe 5 for injecting grout layer 8. One end of the grouting pipe 5 is threadedly connected to a connecting pipe 31, which is fixed to the side wall of an anchor plate 3. One end of the anchor plate 3 is fixedly connected to a prestressed pipe 2, and the prestressed pipe 2 and the anchor plate 3 are fixed inside the precast T-beam 1. A feed funnel 6 is fixedly connected to the top of the grouting pipe 5, which has an "L"-shaped side wall. A tee 7 is installed on the side wall of the grouting pipe 5, and a connecting pipe 71 is vertically installed on the side wall of the tee 7. When grouting is applied to the inside of the prestressed pipe 2, the grouting pipe 5 and the connecting pipe 31 are threadedly connected. After installation, the inlet of the connecting pipe 71 is vertically upward. Grout is introduced through the feed funnel. 6. The grout is fed into the grouting pipe 5. Under the action of gravity, the grout flows inside the grouting pipe 5 to form a grout layer 8. The grout layer 8 flows inside the grouting pipe 5, the tee 7, and the connecting pipe 31 and finally enters the cavity 22, making it easy for workers to quickly fill the cavity 22 with grout. The thickness of the grout layer 8 inside the tee 7 can be observed through the connecting pipe 71. The thickness of the grout layer 8 is half the inner diameter of the tee 7. The tee 7, the grouting pipe 5, and the connecting pipe 31 are not completely filled with grout. During the grouting process inside the cavity 22, the air inside the cavity 22 is discharged through the connecting pipe 31, the grouting pipe 5, and the connecting pipe 71, so that the cavity 22 is completely filled with grout, avoiding residual air inside the prestressed pipe 2 and increasing the density of the filling layer 21.

[0017] Multiple prestressed steel bars 23 are installed inside the prestressed pipe 2, and one end of the prestressed steel bar 23 is fixed inside the anchor plate 3 by the anchor 4 in order to facilitate fixing the prestressed steel bar 23 inside the prestressed pipe 2.

[0018] The prestressed pipe 2 is filled with a filling layer 21. The side wall of the prestressed pipe 2 is connected to the connecting pipe 31, and a cavity 22 is formed between the filling layer 21 and the prestressed pipe 2. Both the filling layer 21 and the grouting layer 8 are composed of prestressed duct grouting material, which is mainly composed of cement, fine aggregate (such as sand and stone), mineral admixtures (mineral powder and silica fume), and admixtures such as high-efficiency water-reducing agent, expanding agent, and stabilizer. Cement provides the strength foundation, and mineral admixtures improve fluidity and durability. This ensures a tight bond between the prestressed steel bar 23 and the concrete, protects the steel bar from corrosion, and gives the grouting material good fluidity, making it easy for the grouting material to enter the cavity 22.

[0019] The bottom end of the connecting pipe 71 is fixedly connected to a baffle 72 with an arc-shaped side wall, and the baffle 72 is located inside the tee 7. The top end of the connecting pipe 71 is threadedly connected to the connector 9, and the inside of the connector 9 is slidably connected to the slide rod 10. The bottom end of the slide rod 10 is fixedly connected to a piston 11. The piston 11 is threadedly connected to the inside of the connecting pipe 71, and the bottom end of the piston 11 abuts against the baffle 72. The diameter of the piston 11 is equal to the minimum inner diameter of the connecting pipe 71. During the grouting process, when the thickness of the grouting material inside the grouting pipe 5 and the tee 3 gradually increases, and the grouting material is about to fill the inside of the connecting pipe 71, the connector 9 is threadedly connected to the connecting pipe 71. The slide rod 10 is slid up and down several times. When the slide rod 10 moves downward, it pushes the piston 11 to slide downward inside the connecting pipe 71, thus filling the grouting pipe 71. The grout inside the connecting pipe 71 is squeezed downwards and slides over the side wall of the baffle 72. The side wall of the baffle 72 is arc-shaped, causing the grout to move along the baffle 72 towards the connecting pipe 31. After moving inside the grouting pipe 5 and the connecting pipe 31, the grout enters the prestressed pipe 2, pushing and squeezing the grout inside the prestressed pipe 2. When the slide rod 10 moves upwards, the piston 11 draws the grout inside the grouting pipe 5 into the connecting pipe 71. With the up and down movement of the piston 11, the grout moves continuously inside the prestressed pipe 2, making it easier for the grout to completely fill the cavity 22, thereby increasing the density of the grout inside the prestressed pipe 2. The continuous movement of the grout also squeezes out any residual air inside the prestressed pipe 2, preventing residual air from remaining inside the prestressed pipe 2.

[0020] The working principle of the secondary grouting device for T-beam prestressed ducts provided by this utility model is as follows: When grouting is performed inside the prestressed pipe 2, the grouting pipe 5 and the connecting pipe 31 are threaded together. After installation, the inlet of the connecting pipe 71 is vertically upward. The grouting material is fed into the grouting pipe 5 through the feed funnel 6. Under the action of gravity, the grouting material flows inside the grouting pipe 5 to form a grouting layer 8. The grouting layer flows inside the grouting pipe 5, the tee 7, and the connecting pipe 31 and finally enters the cavity 22, facilitating the worker's work. The cavity 22 is quickly filled with grout. The thickness of the grout layer inside the tee 7 is observed through the connecting pipe 71, and the speed at which the grout enters the feed funnel 6 is controlled so that the thickness of the grout layer 8 is half the inner diameter of the tee 7. The tee 7, the grout pipe 5, and the connecting pipe 31 are not completely filled with grout. During the grouting process inside the cavity 22, the air inside the cavity 22 is discharged through the connecting pipe 31, the grout pipe 5, and the connecting pipe 71, so that the cavity 22 is completely filled with grout, avoiding residual air inside the prestressed pipe 2. As the grout fills the cavity 22, and the thickness of the grout inside the grouting pipe 5 and the tee 3 gradually increases, and the grout is about to fill the inside of the connecting pipe 71, grouting is stopped. The connector 9 is then threaded into the connecting pipe 71. The slide rod 10 is slid up and down several times. When the slide rod 10 moves downward, it pushes the piston 11 to slide downward inside the connecting pipe 71, squeezing the grout inside the connecting pipe 71 downward. The grout slides over the side wall of the baffle 72, which is arc-shaped, causing the grout to move along the baffle 72 towards the connecting pipe 31, pushing the grout... After moving inside the grouting pipe 5 and the connecting pipe 31, the material enters the prestressed pipe 2, pushing and squeezing the grout material inside the prestressed pipe 2. When the slide rod 10 moves upward, the piston 11 draws the grout material inside the grouting pipe 5 into the connecting pipe 71. As the piston 11 moves up and down, the grout material continuously moves inside the prestressed pipe 2, facilitating the complete filling of the cavity 22, thereby increasing the density of the grout material inside the prestressed pipe 2. Furthermore, the continuous movement of the grout material squeezes out any residual air inside the prestressed pipe 2, preventing air from remaining inside the prestressed pipe 2. The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A secondary grouting device for prestressed ducts in T-beams, characterized in that, include: A grouting pipe (5) is used to inject grout into the grouting layer (8). One end of the grouting pipe (5) is threadedly connected to a connecting pipe (31), and the connecting pipe (31) is fixed to the side wall of the anchor plate (3). One end of the anchor plate (3) is fixedly connected to the prestressed pipe (2), and the prestressed pipe (2) and the anchor plate (3) are fixed inside the precast T-beam (1). The top end of the grouting pipe (5) with an "L"-shaped sidewall is fixedly connected to the feed funnel (6), and a tee (7) is installed on the sidewall of the grouting pipe (5), and a connecting pipe (71) is installed vertically on the sidewall of the tee (7).

2. The secondary grouting device for prestressed ducts of T-beams according to claim 1, characterized in that, Multiple prestressed steel bars (23) are installed inside the prestressed pipe (2), and one end of the prestressed steel bar (23) is fixed inside the anchor plate (3) by an anchor (4).

3. The secondary grouting device for prestressed ducts of T-beams according to claim 1, characterized in that, The prestressed pipe (2) is filled with a filling layer (21), the side wall of the prestressed pipe (2) is connected to the connecting pipe (31), and a cavity (22) is formed between the filling layer (21) and the prestressed pipe (2).

4. The secondary grouting device for prestressed ducts of T-beams according to claim 1, characterized in that, The bottom end of the connecting pipe (71) is fixedly connected to a baffle (72) with an arc-shaped side wall, and the baffle (72) is located inside the tee (7).

5. The secondary grouting device for prestressed ducts of T-beams according to claim 4, characterized in that, The top end of the connecting pipe (71) is threadedly connected to the connector (9), the inside of the connector (9) is slidably connected to the slide rod (10), and the bottom end of the slide rod (10) is fixedly connected to the piston (11).

6. The secondary grouting device for prestressed ducts of T-beams according to claim 5, characterized in that, The piston (11) is threadedly connected to the interior of the connecting pipe (71), the bottom end of the piston (11) abuts against the baffle (72), and the diameter of the piston (11) is equal to the minimum inner diameter of the connecting pipe (71).

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